* TODO:
  * https://github.com/rust-lang/rust#building-from-source
  - https://doc.rust-lang.org/stable/book/
  * https://doc.rust-lang.org/nightly/book/
  * https://github.com/carols10cents/rustlings
  * https://github.com/flosse/rust-os-comparison
  * rustbyexample.com
  * https://github.com/ctjhoa/rust-learning#books
  * https://users.rust-lang.org/
  * https://nbaksalyar.github.io/2015/07/10/writing-chat-in-rust.html
  * https://ricardomartins.cc/2016/08/03/convenient_and_idiomatic_conversions_in_rust
  * https://xion.io/post/code/rust-for-loop.html
  * https://intellij-rust.github.io/features/
  * this new book: https://rust-lang.github.io/book/
    \ old book: https://doc.rust-lang.org/nightly/book/
  * futures
    \ https://aturon.github.io/blog/2016/08/11/futures/
    \ oh this is good!
  * https://github.com/rustomax/rust-iterators

